There are a lot of different species and each one has their own set of typical characteristics. Some of them can be very loud, like the Patagonian and the Sun. Patagonians tend to have lovely personalities though and I've been sort of wanting one for decades.
The only direct conure experience I have was babysitting a pineapple green cheek for a couple of months. He was a fun bird with very different behavior from a cockatiel. He was a little nippy though and liked to bite my fingers. I didn't let him near the cockatiels; he actually weighed a little less than they do but he had a much bigger beak, and I was afraid he'd hurt them.
This is how he liked to take a bath. Looks more like a squid than a bird IMO.
